Motor-vehicle brake



Dec. 15, 1925 J. c. MoRRi-:LL

MOTOR `VEHICLE BRAKE Fled'May 5, 1924 lNVENTOR JOSEPH C.MORRELL f Qf, W

ATTORNEY a citizen' ofthe United States,fresiding at' vPaumaa Dee. r1, 1925.

[UNITED STATES PATENT OFFICE.

JOSEPH c. NOERELL, or WHITEI vHousE Am BRAKE coMrANY., o E

or PENN snrLvAN1A-4 i 'Appueaaon mea lmy s,

To all, wlw/m. concern.'

' lBe it known-'thatL JosErH C. MQRRELL,

White Plains, in the county of Westchester and vState of New York, have invented new and useful Improvements in Motor-Vehicle Brakes, of lwhich the following `is a 'specifi-Y As shown in the drawing, ytheequipment may comprise a brake chamber 1, connected by pipe 2 to a brake valve device 3, a main reservoir or source of fluid under pressure 4, and an emergency valve device 5.

The emergency valve device' 5 may comv prise, a casinghaving a chamber containing a flexible diaphragm'. Secured to said diaphragm is a valve stem 7, carrying a supply valve S and a 'release valve 9. The chamber 10 at one side. of the diaphragm 6 isconnected to pipe 11 which communicates with, the main reservoir 4. Chamber 12 at the other side of the diaphragml is'connected to an'emergency reservoir 13.

The space surrounding the valve stem 7 is connected to a pipe 14 which leads to the seat of the rotary valve 15 of the-brake valve device 3. The brake valve device 3 is shown in the drawing las ofthe rotary slide valve type, although any otlier brake valve device, such as the type employed in connection with automatic fluid pressure brakes may be employed.

In operation, with the brake valve handle 16 in release position, as shown in the drawing, the rotary valve' 15` connects pipe 14 through a cavity 17 with pipe 2.' Fluid under pressure is sup lied from the main reservoir 4, through pipe 11to diaphragm chamber 10 of the emergency valve device 5 and operates to press the free periphery of the diaphragm outwardly, so as to permit flow of fluid from chamber 10 to chamber PLAINS, NEW Yoan, AssIeNoE 'ro THE wEs'rrNe- WILMERDING, PENNsYLvANIA, A conronA'rxoN MorronvEnIcLE BRAKE. l

19a-1. semi No,A yioga and 'thence .tov the emergency reservoir 13. Saidfreservoirlis thus'normally charged e with fluid vunder pressure.

` If the pipe 11 should break, the pressure in chamber .10 of the emergency valve device will be reduced and the emergency reservoirpressure in chamber 12 will act on the diaphragm 6 to flex same, so as to lift the valve-stem 7 and cause the valve 9 to seat while valve 8 is unseated. Fluid under pressure willV then be supplied from. the reservolr 13, past the valve 8 to pipe 14 and thence through cavity 17 of the rotary valve' 15 to pipe 2 and`the brake chamber 1. The flexible diaphragm 18 in the brake chamber is then moved outwardly to effect an applicationvef the brakes.

'In the norni'l operation of the brakes, when the brake valve handle 16 is in release position, fluid is released from the brake chamber 1 through pipe 2, cavity 17 in the rotary valve 15, pipe 14 and past the normally open release valve 9 of the emer-` an atmospheric ex# gency valve device 5 to haust port 19.

It will thus be seen. that since the exhaust from the brake chamber 1 through the brake valve device is controlled by the emergency valve device 5, the exhaustv will be closed by operation of the emergency valve device even thou h the brake valve device is in release position. I Having now described my invention, what I claim as new and desire to secure by Letters Patent, is

1. In a fluid ressure brake, the combination with a bra e valve device 'for controlling theapplication and vrelease of the brakes, of ,a source of fluid under pressure from which fluid is supplied by operation of said brake valve device to apply the brakes, and an emergency Yvalve device rovided with an exhaust port through w ich fluidis released by operation of said brake valve device in releasing the brakes and operating upon loss of pressure from said source for closing said exhaust port and for effecting an application of the brakes.

2. In a fluid pressure brake, the combination with a brake chamber anda brake valve device for lsupplying and releasing fluid to and from said brake chamber, of a source of fluid under pressure from which fluid under pressure yis supplied to the brake chamber' by operation of the brake valve vided with an exhaust port through which fluid is released from the brake chamber by operation of the brake valve device and operating upon failure of 'pressure in said source for closing said exhaust port and for supplying fluid under pressure to said brake chamber.

3. In a fluid pressurev brake, the combination with a brake application and release pipe, a main eservoir, and a brake valve device connect vd by a pipe to said reservoir and adapted to control the supply and release of fluid to and from said brake applicationand release pipe, of a valve device normally connecting said brake application and release pipe, through said brake valve device, with an exhaust port and operating 'upon breakage of said main reservoir pipe for closing said exhaust port and :for'supplying fluid under pressure through said brake valve device to the brake application and release pipe.

In testimony whereof I have hereunto set my hand. 1

JOSEPH c. MORRELL. 

